/
multipart.go
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/
multipart.go
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package stores
import (
"context"
"encoding/hex"
"errors"
"fmt"
"math"
"sort"
"strings"
"unicode/utf8"
"go.sia.tech/core/types"
"go.sia.tech/renterd/api"
"go.sia.tech/renterd/object"
"gorm.io/gorm"
"lukechampine.com/frand"
)
type (
dbMultipartUpload struct {
Model
Key secretKey
UploadID string `gorm:"uniqueIndex;NOT NULL;size:64"`
ObjectID string `gorm:"index:idx_multipart_uploads_object_id;NOT NULL"`
DBBucket dbBucket `gorm:"constraint:OnDelete:CASCADE"` // CASCADE to delete uploads when bucket is deleted
DBBucketID uint `gorm:"index:idx_multipart_uploads_db_bucket_id;NOT NULL"`
Parts []dbMultipartPart // no CASCADE, parts are deleted via trigger
Metadata []dbObjectUserMetadata `gorm:"constraint:OnDelete:SET NULL"` // CASCADE to delete parts too
MimeType string `gorm:"index:idx_multipart_uploads_mime_type"`
}
dbMultipartPart struct {
Model
Etag string `gorm:"index"`
PartNumber int `gorm:"index"`
Size uint64
DBMultipartUploadID uint `gorm:"index;NOT NULL"`
Slabs []dbSlice // no CASCADE, slices are deleted via trigger
}
)
func (dbMultipartUpload) TableName() string {
return "multipart_uploads"
}
func (dbMultipartPart) TableName() string {
return "multipart_parts"
}
func (s *SQLStore) CreateMultipartUpload(ctx context.Context, bucket, path string, ec object.EncryptionKey, mimeType string, metadata api.ObjectUserMetadata) (api.MultipartCreateResponse, error) {
// Marshal key
key, err := ec.MarshalBinary()
if err != nil {
return api.MultipartCreateResponse{}, err
}
var uploadID string
err = s.retryTransaction(func(tx *gorm.DB) error {
// Get bucket id.
var bucketID uint
err := tx.Table("(SELECT id from buckets WHERE buckets.name = ?) bucket_id", bucket).
Take(&bucketID).Error
if errors.Is(err, gorm.ErrRecordNotFound) {
return fmt.Errorf("bucket %v not found: %w", bucket, api.ErrBucketNotFound)
} else if err != nil {
return fmt.Errorf("failed to fetch bucket id: %w", err)
}
// Create multipart upload
uploadIDEntropy := frand.Entropy256()
uploadID = hex.EncodeToString(uploadIDEntropy[:])
multipartUpload := dbMultipartUpload{
DBBucketID: bucketID,
Key: key,
UploadID: uploadID,
ObjectID: path,
MimeType: mimeType,
}
if err := tx.Create(&multipartUpload).Error; err != nil {
return fmt.Errorf("failed to create multipart upload: %w", err)
}
// Create multipart metadata
if err := s.createMultipartMetadata(tx, multipartUpload.ID, metadata); err != nil {
return fmt.Errorf("failed to create multipart metadata: %w", err)
}
return nil
})
return api.MultipartCreateResponse{
UploadID: uploadID,
}, err
}
func (s *SQLStore) AddMultipartPart(ctx context.Context, bucket, path, contractSet, eTag, uploadID string, partNumber int, slices []object.SlabSlice) (err error) {
// collect all used contracts
usedContracts := make(map[types.PublicKey]map[types.FileContractID]struct{})
for _, s := range slices {
for _, shard := range s.Shards {
for h, fcids := range shard.Contracts {
for _, fcid := range fcids {
if _, exists := usedContracts[h]; !exists {
usedContracts[h] = make(map[types.FileContractID]struct{})
}
usedContracts[h][fcid] = struct{}{}
}
}
}
}
return s.retryTransaction(func(tx *gorm.DB) error {
// Fetch contract set.
var cs dbContractSet
if err := tx.Take(&cs, "name = ?", contractSet).Error; err != nil {
return fmt.Errorf("contract set %v not found: %w", contractSet, err)
}
// Fetch the used contracts.
contracts, err := fetchUsedContracts(tx, usedContracts)
if err != nil {
return fmt.Errorf("failed to fetch used contracts: %w", err)
}
// Find multipart upload.
var mu dbMultipartUpload
err = tx.Where("upload_id", uploadID).
Take(&mu).
Error
if err != nil {
return fmt.Errorf("failed to fetch multipart upload: %w", err)
}
// Delete a potentially existing part.
err = tx.Model(&dbMultipartPart{}).
Where("db_multipart_upload_id = ? AND part_number = ?", mu.ID, partNumber).
Delete(&dbMultipartPart{}).
Error
if err != nil {
return fmt.Errorf("failed to delete existing part: %w", err)
}
var size uint64
for _, slice := range slices {
size += uint64(slice.Length)
}
// Create a new part.
part := dbMultipartPart{
Etag: eTag,
PartNumber: partNumber,
DBMultipartUploadID: mu.ID,
Size: size,
}
err = tx.Create(&part).Error
if err != nil {
return fmt.Errorf("failed to create part: %w", err)
}
// Create the slices.
err = s.createSlices(tx, nil, &part.ID, cs.ID, contracts, slices)
if err != nil {
return fmt.Errorf("failed to create slices: %w", err)
}
return nil
})
}
func (s *SQLStore) MultipartUpload(ctx context.Context, uploadID string) (resp api.MultipartUpload, err error) {
err = s.retryTransaction(func(tx *gorm.DB) error {
var dbUpload dbMultipartUpload
err := tx.
Model(&dbMultipartUpload{}).
Joins("DBBucket").
Where("upload_id", uploadID).
Take(&dbUpload).
Error
if errors.Is(err, gorm.ErrRecordNotFound) {
return api.ErrMultipartUploadNotFound
} else if err != nil {
return err
}
resp, err = dbUpload.convert()
return err
})
return
}
func (s *SQLStore) MultipartUploads(ctx context.Context, bucket, prefix, keyMarker, uploadIDMarker string, limit int) (resp api.MultipartListUploadsResponse, err error) {
limitUsed := limit > 0
if !limitUsed {
limit = math.MaxInt64
} else {
limit++
}
// both markers must be used together
if (keyMarker == "" && uploadIDMarker != "") || (keyMarker != "" && uploadIDMarker == "") {
return api.MultipartListUploadsResponse{}, errors.New("both keyMarker and uploadIDMarker must be set or neither")
}
markerExpr := exprTRUE
if keyMarker != "" {
markerExpr = gorm.Expr("object_id > ? OR (object_id = ? AND upload_id > ?)", keyMarker, keyMarker, uploadIDMarker)
}
prefixExpr := exprTRUE
if prefix != "" {
prefixExpr = gorm.Expr("SUBSTR(object_id, 1, ?) = ?", utf8.RuneCountInString(prefix), prefix)
}
err = s.retryTransaction(func(tx *gorm.DB) error {
var dbUploads []dbMultipartUpload
err := tx.
Model(&dbMultipartUpload{}).
Joins("DBBucket").
Where("DBBucket.name", bucket).
Where("?", markerExpr).
Where("?", prefixExpr).
Order("object_id ASC, upload_id ASC").
Limit(limit).
Find(&dbUploads).
Error
if err != nil {
return err
}
// Check if there are more uploads beyond 'limit'.
if limitUsed && len(dbUploads) == int(limit) {
resp.HasMore = true
dbUploads = dbUploads[:len(dbUploads)-1]
resp.NextPathMarker = dbUploads[len(dbUploads)-1].ObjectID
resp.NextUploadIDMarker = dbUploads[len(dbUploads)-1].UploadID
}
for _, upload := range dbUploads {
u, err := upload.convert()
if err != nil {
return err
}
resp.Uploads = append(resp.Uploads, u)
}
return nil
})
return
}
func (s *SQLStore) MultipartUploadParts(ctx context.Context, bucket, object string, uploadID string, marker int, limit int64) (resp api.MultipartListPartsResponse, _ error) {
limitUsed := limit > 0
if !limitUsed {
limit = math.MaxInt64
} else {
limit++
}
err := s.retryTransaction(func(tx *gorm.DB) error {
var dbParts []dbMultipartPart
err := tx.
Model(&dbMultipartPart{}).
Joins("INNER JOIN multipart_uploads mus ON mus.id = multipart_parts.db_multipart_upload_id").
Joins("INNER JOIN buckets b ON b.name = ? AND b.id = mus.db_bucket_id", bucket).
Where("mus.object_id = ? AND mus.upload_id = ? AND part_number > ?", object, uploadID, marker).
Order("part_number ASC").
Limit(int(limit)).
Find(&dbParts).
Error
if err != nil {
return err
}
// Check if there are more parts beyond 'limit'.
if limitUsed && len(dbParts) == int(limit) {
resp.HasMore = true
dbParts = dbParts[:len(dbParts)-1]
resp.NextMarker = dbParts[len(dbParts)-1].PartNumber
}
for _, part := range dbParts {
resp.Parts = append(resp.Parts, api.MultipartListPartItem{
PartNumber: part.PartNumber,
LastModified: api.TimeRFC3339(part.CreatedAt.UTC()),
ETag: part.Etag,
Size: int64(part.Size),
})
}
return nil
})
return resp, err
}
func (s *SQLStore) AbortMultipartUpload(ctx context.Context, bucket, path string, uploadID string) error {
return s.retryTransaction(func(tx *gorm.DB) error {
// delete multipart upload optimistically
res := tx.
Where("upload_id", uploadID).
Where("object_id", path).
Where("db_bucket_id = (SELECT id FROM buckets WHERE buckets.name = ?)", bucket).
Delete(&dbMultipartUpload{})
if res.Error != nil {
return fmt.Errorf("failed to fetch multipart upload: %w", res.Error)
}
// if the upload wasn't found, find out why
if res.RowsAffected == 0 {
var mu dbMultipartUpload
err := tx.Where("upload_id = ?", uploadID).
Joins("DBBucket").
Take(&mu).
Error
if errors.Is(err, gorm.ErrRecordNotFound) {
return api.ErrMultipartUploadNotFound
} else if err != nil {
return fmt.Errorf("failed to fetch multipart upload: %w", err)
} else if mu.ObjectID != path {
return fmt.Errorf("object id mismatch: %v != %v: %w", mu.ObjectID, path, api.ErrObjectNotFound)
} else if mu.DBBucket.Name != bucket {
return fmt.Errorf("bucket name mismatch: %v != %v: %w", mu.DBBucket.Name, bucket, api.ErrBucketNotFound)
}
return errors.New("failed to delete multipart upload for unknown reason")
}
// Prune the slabs.
if err := pruneSlabs(tx); err != nil {
return fmt.Errorf("failed to prune slabs: %w", err)
}
return nil
})
}
func (s *SQLStore) CompleteMultipartUpload(ctx context.Context, bucket, path string, uploadID string, parts []api.MultipartCompletedPart) (_ api.MultipartCompleteResponse, err error) {
// Sanity check input parts.
if !sort.SliceIsSorted(parts, func(i, j int) bool {
return parts[i].PartNumber < parts[j].PartNumber
}) {
return api.MultipartCompleteResponse{}, fmt.Errorf("provided parts are not sorted")
}
for i := 0; i < len(parts)-1; i++ {
if parts[i].PartNumber == parts[i+1].PartNumber {
return api.MultipartCompleteResponse{}, fmt.Errorf("duplicate part number %v", parts[i].PartNumber)
}
}
var eTag string
err = s.retryTransaction(func(tx *gorm.DB) error {
// Find multipart upload.
var mu dbMultipartUpload
err = tx.Where("upload_id = ?", uploadID).
Preload("Parts").
Joins("DBBucket").
Take(&mu).
Error
if err != nil {
return fmt.Errorf("failed to fetch multipart upload: %w", err)
}
// Check object id.
if mu.ObjectID != path {
return fmt.Errorf("object id mismatch: %v != %v: %w", mu.ObjectID, path, api.ErrObjectNotFound)
}
// Check bucket name.
if mu.DBBucket.Name != bucket {
return fmt.Errorf("bucket name mismatch: %v != %v: %w", mu.DBBucket.Name, bucket, api.ErrBucketNotFound)
}
// Delete potentially existing object.
_, err := s.deleteObject(tx, bucket, path)
if err != nil {
return fmt.Errorf("failed to delete object: %w", err)
}
// Sort the parts.
sort.Slice(mu.Parts, func(i, j int) bool {
return mu.Parts[i].PartNumber < mu.Parts[j].PartNumber
})
// Find relevant parts.
var dbParts []dbMultipartPart
var size uint64
j := 0
for _, part := range parts {
for {
if j >= len(mu.Parts) {
// ran out of parts in the database
return api.ErrPartNotFound
} else if mu.Parts[j].PartNumber > part.PartNumber {
// missing part
return api.ErrPartNotFound
} else if mu.Parts[j].PartNumber == part.PartNumber && mu.Parts[j].Etag == strings.Trim(part.ETag, "\"") {
// found a match
dbParts = append(dbParts, mu.Parts[j])
size += mu.Parts[j].Size
j++
break
} else {
// try next
j++
}
}
}
// Fetch all the slices in the right order.
var slices []dbSlice
h := types.NewHasher()
for _, part := range dbParts {
var partSlices []dbSlice
err = tx.Model(&dbSlice{}).
Joins("INNER JOIN multipart_parts mp ON mp.id = slices.db_multipart_part_id AND mp.id = ?", part.ID).
Joins("INNER JOIN multipart_uploads mus ON mus.id = mp.db_multipart_upload_id").
Find(&partSlices).
Error
if err != nil {
return fmt.Errorf("failed to fetch slices: %w", err)
}
slices = append(slices, partSlices...)
if _, err = h.E.Write([]byte(part.Etag)); err != nil {
return fmt.Errorf("failed to hash etag: %w", err)
}
}
// Compute ETag.
sum := h.Sum()
eTag = hex.EncodeToString(sum[:])
// Create the object.
obj := dbObject{
DBBucketID: mu.DBBucketID,
ObjectID: path,
Key: mu.Key,
Size: int64(size),
MimeType: mu.MimeType,
Etag: eTag,
}
if err := tx.Create(&obj).Error; err != nil {
return fmt.Errorf("failed to create object: %w", err)
}
// Assign the right object id and unassign the multipart upload. Also
// set the right object_index to make sure the slices are sorted
// correctly when retrieving the object later.
for i := range slices {
err = tx.Model(&dbSlice{}).
Where("id", slices[i].ID).
Updates(map[string]interface{}{
"db_object_id": obj.ID,
"object_index": uint(i + 1),
"db_multipart_part_id": nil,
}).Error
if err != nil {
return fmt.Errorf("failed to update slice %v: %w", i, err)
}
}
// Update user metadata.
if err := tx.
Model(&dbObjectUserMetadata{}).
Where("db_multipart_upload_id = ?", mu.ID).
Updates(map[string]interface{}{
"db_object_id": obj.ID,
"db_multipart_upload_id": nil,
}).Error; err != nil {
return fmt.Errorf("failed to update user metadata: %w", err)
}
// Delete the multipart upload.
if err := tx.Delete(&mu).Error; err != nil {
return fmt.Errorf("failed to delete multipart upload: %w", err)
}
// Prune the slabs.
if err := pruneSlabs(tx); err != nil {
return fmt.Errorf("failed to prune slabs: %w", err)
}
return nil
})
if err != nil {
return api.MultipartCompleteResponse{}, err
}
return api.MultipartCompleteResponse{
ETag: eTag,
}, nil
}
func (u dbMultipartUpload) convert() (api.MultipartUpload, error) {
var key object.EncryptionKey
if err := key.UnmarshalBinary(u.Key); err != nil {
return api.MultipartUpload{}, fmt.Errorf("failed to unmarshal key: %w", err)
}
return api.MultipartUpload{
Bucket: u.DBBucket.Name,
Key: key,
Path: u.ObjectID,
UploadID: u.UploadID,
CreatedAt: api.TimeRFC3339(u.CreatedAt.UTC()),
}, nil
}